Improve display support for RTL languages

### Description

The form renders correctly, but everything is left-aligned.

Some components might need to adjust their controls (buttons, kebab menu) to support right-aligned text.

XML Form

```xml

RTL.Alignment.Test




<p style="text-align:end">واحد</p>


<p style="text-align:center">اثنين</p>


<p style="text-align:start">ثلاثة</p>


أربعة


تسمية السؤال المحاذاة بشكل صحيح




<p style="text-align:end">one</p>


<p style="text-align:center">two</p>


<p style="text-align:start">three</p>


four


Correctly-aligned question label














options-0
one


options-1
two


options-2
three


options-3
four

```

### Related Issues

- https://docs.getodk.org/form-language/

Start with the XML form example in the issue and inspect the web form rendering and controls it identifies, including buttons and the kebab menu. Verify Arabic right-to-left rendering, text alignment, and control placement; the work is done when the form and its controls display correctly for RTL languages.

Written by the indexing model from the issue text.